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Questions & Answers
gas block size

From Criterion’s website:
“0.625” Gas Block, dimpled for ease of installation...”

by Pancho, Verified Owner, April 23, 2021
Are the barrels in this listing chrome lined? Expert Answer

Yes. The Criterion Barrels AR-15 Pencil Mid Length Gas System Barrels are chrome lined internally for superior barrel life and corrosion resistance.

by Ethan, Gear Expert, June 14, 2022
Customer Reviews
Helpful Positive Review
I have this pencil barrel sitting under a Primary arms ACSS 1-6 scope. With fed M193 I sighted it in at 25y and was stacking holes on holes. Once it was sighted in I moved out to a 12” steel plate and 300y. 300 got boringly easy so I moved On to a 14...
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6/6 found this helpful
Helpful Positive Review
The barrel is good in that the chrome lining and pencil profile are a great idea. The particular barrel I bought had extra weight towards the front of the barrel and the diameter of it was thicker than the rear half. I didn't like the extra weight so...
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3/11 found this helpful
Most Recent Reviews
Criterion barrel by Ratrod79, Verified Owner, May 11, 2025
This barrel is great, extremely accurate, light weight and fun to shoot, the price is up there but it’s worth every penny.
Read All 3 Reviews

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Help support American manufacturing! Marked models of this product have gone through rigorous review and been certified by the manufacturer as Made in the USA.

Product Info for Criterion Barrels AR-15 Mid Length Gas System Barrel

If maximum mobility and extreme weight savings is yTheir goal, the pencil contour is Their lightest weight offering. These barrels feature the most refined chrome lining in the industry to maximize accuracy and durability.image

Specifications for Criterion Barrels AR-15 Mid Length Gas System Barrel:

Manufacturer: Criterion Barrels
Color: Black
Finish: Parkerized
Fabric/Material: Steel
Caliber: .223 Wylde
Barrel Length: 16 in
Gas System Length: Mid Length
Barrel Twist Rate: 1-8
Flutes: No
Gun Make: AR Platform
Gun Model: AR-15
Additional Features: M4 Barrel Extension
Firearms Threads Per Inch: 1/2x28
Country of Origin: USA

Features of Criterion Barrels AR-15 Mid Length Gas System Barrel

  • Chrome-lined internally for superior barrel life and corrosion resistance. Their chrome-lining process is the most refined in the industry and will not degrade accuracy.
  • .223 Wylde chamber that is designed to safely and effectively fire both .223 Remington and 5.56 NATO ammunition
  • Honed and hand-lapped rifling for bore uniformity and a pristine internal finish - aids in barrel cleaning and paramount for accuracy
  • Finely polished chambers for reliable extraction and feeding
  • Mid-length gas system compatible with AR15 gas tube system
  • Gas hole tuned for proper function with and without suppressor
  • 1/2x28 TPI muzzle threads compatible with a wide range of muzzle devices and suppressors
  • Precision-machined barrel extension with M4 feed ramps

Package Contents:

  • Criterion Barrels AR-15 Mid Length Gas System Barrel

Criterion Barrels AR-15 Mid Length Gas System Barrel Orderable Models

List of Orderable Models

  • Criterion Barrels Mid Length Barrel, AR-15, .223 Wylde, 16 in, Pencil, .625 in, Parkerized Black, 15160-PN8 , MPN: 15160-PN8 , Code: 2RR-ATB-MPNCL-15160-PN8
  • Criterion Barrels Mid Length Barrel, AR-15, .223 Wylde, 16 in, Ultralight, .750 in, Parkerized Black, 15160-UL8 , MPN: 15160-UL8 , Code: 2RR-ATB-MPNCL-15160-UL8
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